.yuandian .changeColor {
    background-color: orange;
}

/* 焦点图圆点制作 */
.yuandian {
    position: absolute;
    bottom: 10px;
    left: 50%;
    margin-left: -35px;
    width: 70px;
    height: 13px;
    border-radius: 25px;
    background: rgba(255, 255, 255, .2)
    
}

.yuandian li {
    float: left;
    width: 8px;
    height: 8px;
    margin: 3px;
    list-style: none;
    background-color: #fff;
    border-radius: 50%;
    z-index: 999;
}